LXR linux/drivers/gpu/drm/gma500/mmu.h

   1/**************************************************************************
   2 * Copyright (c) 2007-2011, Intel Corporation.
   3 * All Rights Reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms and conditions of the GNU General Public License,
   7 * version 2, as published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12 * more details.
  13 **************************************************************************/
  14
  15#ifndef __MMU_H
  16#define __MMU_H
  17
  18struct psb_mmu_driver {
  19        /* protects driver- and pd structures. Always take in read mode
  20         * before taking the page table spinlock.
  21         */
  22        struct rw_semaphore sem;
  23
  24        /* protects page tables, directory tables and pt tables.
  25         * and pt structures.
  26         */
  27        spinlock_t lock;
  28
  29        atomic_t needs_tlbflush;
  30        atomic_t *msvdx_mmu_invaldc;
  31        struct psb_mmu_pd *default_pd;
  32        uint32_t bif_ctrl;
  33        int has_clflush;
  34        int clflush_add;
  35        unsigned long clflush_mask;
  36
  37        struct drm_device *dev;
  38};
  39
  40struct psb_mmu_pd;
  41
  42struct psb_mmu_pt {
  43        struct psb_mmu_pd *pd;
  44        uint32_t index;
  45        uint32_t count;
  46        struct page *p;
  47        uint32_t *v;
  48};
  49
  50struct psb_mmu_pd {
  51        struct psb_mmu_driver *driver;
  52        int hw_context;
  53        struct psb_mmu_pt **tables;
  54        struct page *p;
  55        struct page *dummy_pt;
  56        struct page *dummy_page;
  57        uint32_t pd_mask;
  58        uint32_t invalid_pde;
  59        uint32_t invalid_pte;
  60};
  61
  62extern struct psb_mmu_driver *psb_mmu_driver_init(struct drm_device *dev,
  63                                                  int trap_pagefaults,
  64                                                  int invalid_type,
  65                                                  atomic_t *msvdx_mmu_invaldc);
  66extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver);
  67extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver
  68                                                 *driver);
  69extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
  70                                           int trap_pagefaults,
  71                                           int invalid_type);
  72extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd);
  73extern void psb_mmu_flush(struct psb_mmu_driver *driver);
  74extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd,
  75                                        unsigned long address,
  76                                        uint32_t num_pages);
  77extern int psb_mmu_insert_pfn_sequence(struct psb_mmu_pd *pd,
  78                                       uint32_t start_pfn,
  79                                       unsigned long address,
  80                                       uint32_t num_pages, int type);
  81extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual,
  82                                  unsigned long *pfn);
  83extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context);
  84extern int psb_mmu_insert_pages(struct psb_mmu_pd *pd, struct page **pages,
  85                                unsigned long address, uint32_t num_pages,
  86                                uint32_t desired_tile_stride,
  87                                uint32_t hw_tile_stride, int type);
  88extern void psb_mmu_remove_pages(struct psb_mmu_pd *pd,
  89                                 unsigned long address, uint32_t num_pages,
  90                                 uint32_t desired_tile_stride,
  91                                 uint32_t hw_tile_stride);
  92
  93#endif
  94